ZHCSCK8H May   2014  – April 2025 LP8860-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5.   Device Comparison Table
  6. 4 Pin Configuration and Functions
    1.     Pin Functions
  7. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Electrical Characteristics
    6. 5.6  Current Sinks Electrical Characteristics
    7. 5.7  Boost Converter Characteristics
    8. 5.8  Logic Interface Characteristics
    9. 5.9  VIN Undervoltage Protection (VIN_UVLO)
    10. 5.10 VDD Undervoltage Protection (VDD_UVLO)
    11. 5.11 VIN Overvoltage Protection (VIN_OVP)
    12. 5.12 VIN Overcurrent Protection (VIN_OCP)
    13. 5.13 Power-Line FET Control Electrical Characteristics
    14. 5.14 External Temp Sensor Control Electrical Characteristics
    15. 5.15 I2C Serial Bus Timing Parameters (SDA, SCLK)
    16. 5.16 SPI Timing Requirements
    17. 5.17 Typical Characteristics
  8. 6 Detailed Description
    1. 6.1 Overview
      1. 6.1.1 Boost Controller
      2. 6.1.2 LED Output Configurations
      3. 6.1.3 Display Mode
      4. 6.1.4 Cluster Mode
      5. 6.1.5 Hybrid Dimming
      6. 6.1.6 Charge Pump and Square Waveform (SQW) Output
      7. 6.1.7 Power-Line FET
      8. 6.1.8 Protection Features
      9. 6.1.9 Advanced Thermal Protection Features
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Clock Generation
        1. 6.3.1.1 LED PWM Clock Generation With VSYNC
        2. 6.3.1.2 LED PWM Frequency and Resolution
      2. 6.3.2 Brightness Control (Display Mode)
        1. 6.3.2.1 PWM Input Duty Cycle Based Control
        2. 6.3.2.2 Brightness Register Control
        3. 6.3.2.3 PWM Input Duty × Brightness Register
        4. 6.3.2.4 PWM-Input Direct Control
        5. 6.3.2.5 Brightness Slope
        6. 6.3.2.6 LED Dimming Methods
        7. 6.3.2.7 PWM Calculation Data Flow for Display Mode
      3. 6.3.3 LED Output Modes and Phase Shift PWM (PSPWM) Scheme
      4. 6.3.4 LED Current Setting
      5. 6.3.5 Cluster Mode
      6. 6.3.6 Boost Controller
      7. 6.3.7 Charge Pump
      8. 6.3.8 Powerline Control FET
      9. 6.3.9 Protection and Fault Detection Modes
        1. 6.3.9.1 LED Fault Comparators and Adaptive Boost Control
        2. 6.3.9.2 LED Current Dimming With Internal Temperature Sensor
        3. 6.3.9.3 LED Current Limitation With External NTC Sensor
        4. 6.3.9.4 LED Current Dimming With External NTC Sensor
        5. 6.3.9.5 Protection Feature and Fault Summary
    4. 6.4 Device Functional Modes
      1. 6.4.1 Standby Mode
      2. 6.4.2 Active Mode
      3. 6.4.3 Fault Recovery State
      4. 6.4.4 Start-Up and Shutdown Sequences
    5. 6.5 Programming
      1. 6.5.1 EEPROM
      2. 6.5.2 Serial Interface
        1. 6.5.2.1 SPI Interface
        2. 6.5.2.2 I2C Serial Bus Interface
          1. 6.5.2.2.1 Interface Bus Overview
          2. 6.5.2.2.2 Data Transactions
          3. 6.5.2.2.3 Acknowledge Cycle
          4. 6.5.2.2.4 Acknowledge After Every Byte Rule
          5. 6.5.2.2.5 Addressing Transfer Formats
          6. 6.5.2.2.6 Control Register Write Cycle
          7. 6.5.2.2.7 Control Register Read Cycle
    6. 6.6 Register Maps
      1. 6.6.1 Register Bit Explanations
        1. 6.6.1.1  Display/Cluster1 Brightness Control MSB
        2. 6.6.1.2  Display/Cluster1 Brightness Control LSB
        3. 6.6.1.3  Display/Cluster1 Output Current MSB
        4. 6.6.1.4  Display/Cluster1 Output Current LSB
        5. 6.6.1.5  Cluster2 Brightness Control MSB
        6. 6.6.1.6  Cluster2 Brightness Control LSB
        7. 6.6.1.7  Cluster2 Output Current
        8. 6.6.1.8  Cluster3 Brightness Control MSB
        9. 6.6.1.9  Cluster3 Brightness Control LSB
        10. 6.6.1.10 Cluster3 Output Current
        11. 6.6.1.11 Cluster4 Brightness Control MSB
        12. 6.6.1.12 Cluster4 Brightness Control LSB
        13. 6.6.1.13 Cluster4 Output Current
        14. 6.6.1.14 Configuration
        15. 6.6.1.15 Status
        16. 6.6.1.16 Fault
        17. 6.6.1.17 LED Fault
        18. 6.6.1.18 Fault Clear
        19. 6.6.1.19 Identification
        20. 6.6.1.20 Temp MSB
        21. 6.6.1.21 Temp LSB
        22. 6.6.1.22 Display LED Current MSB
        23. 6.6.1.23 Display LED Current LSB
        24. 6.6.1.24 Display LED PWM MSB
        25. 6.6.1.25 Display LED PWM LSB
        26. 6.6.1.26 EEPROM Control
        27. 6.6.1.27 EEPROM Unlock Code
      2. 6.6.2 EEPROM Bit Explanations
        1. 6.6.2.1  EEPROM Register 0
        2. 6.6.2.2  EEPROM Register 1
        3. 6.6.2.3  EEPROM Register 2
        4. 6.6.2.4  EEPROM Register 3
        5. 6.6.2.5  EEPROM Register 4
        6. 6.6.2.6  EEPROM Register 5
        7. 6.6.2.7  EEPROM Register 6
        8. 6.6.2.8  EEPROM Register 7
        9. 6.6.2.9  EEPROM Register 8
        10. 6.6.2.10 EEPROM Register 9
        11. 6.6.2.11 EEPROM Register 10
        12. 6.6.2.12 EEPROM Register 11
        13. 6.6.2.13 EEPROM Register 12
        14. 6.6.2.14 EEPROM Register 13
        15. 6.6.2.15 EEPROM Register 14
        16. 6.6.2.16 EEPROM Register 15
        17. 6.6.2.17 EEPROM Register 16
        18. 6.6.2.18 EEPROM Register 17
        19. 6.6.2.19 EEPROM Register 18
        20. 6.6.2.20 EEPROM Register 19
        21. 6.6.2.21 EEPROM Register 20
        22. 6.6.2.22 EEPROM Register 21
        23. 6.6.2.23 EEPROM Register 22
        24. 6.6.2.24 EEPROM Register 23
        25. 6.6.2.25 EEPROM Register 24
  9. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Typical Application for Display Backlight
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1  Inductor Selection
          2. 7.2.1.2.2  Output Capacitor Selection
          3. 7.2.1.2.3  Input Capacitor Selection
          4. 7.2.1.2.4  Charge Pump Output Capacitor
          5. 7.2.1.2.5  Charge Pump Flying Capacitor
          6. 7.2.1.2.6  Diode
          7. 7.2.1.2.7  Boost Converter Transistor
          8. 7.2.1.2.8  Boost Sense Resistor
          9. 7.2.1.2.9  Power Line Transistor
          10. 7.2.1.2.10 Input Current Sense Resistor
          11. 7.2.1.2.11 Filter Component Values
            1. 7.2.1.2.11.1 Critical Components for Design
        3. 7.2.1.3 Application Performance Plots
      2. 7.2.2 Low VDD Voltage and Combined Output Mode Application
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
        3. 7.2.2.3 Application Performance Plots
      3. 7.2.3 High Output Voltage Application
        1. 7.2.3.1 Design Requirements
        2. 7.2.3.2 Detailed Design Procedure
        3. 7.2.3.3 Application Performance Plots
      4. 7.2.4 High Output Current Application
        1. 7.2.4.1 Design Requirements
        2. 7.2.4.2 Detailed Design Procedure
        3. 7.2.4.3 Application Performance Plots
      5. 7.2.5 Three-Channel Configuration Without Serial Interface
        1. 7.2.5.1 Design Requirements
        2. 7.2.5.2 Detailed Design Procedure
        3. 7.2.5.3 Application Performance Plots
      6. 7.2.6 Solution With Minimum External Components
        1. 7.2.6.1 Design Requirements
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  10. 8 Device and Documentation Support
    1. 8.1 Device Support
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Community Resources
    5. 8.5 Trademarks
  11. 9 Revision History
  12. 10Mechanical, Packaging, and Orderable Information

3 说明

LP8860-Q1 是一款具有升压控制器的汽车高效 LED 驱动器。该器件具有可通过 PWM 输入信号、SPI 和/或 I2C 主机（或二者）控制的 4 路高精度电流阱。

升压转换器基于 LED 电流阱余量电压进行自适应输出电压控制。该特性可在所有条件下将电压调节到能够满足需要的最低水平，从而更大限度地降低功耗。凭借宽范围可调频率，LP8860-Q1 能够避免对 AM 无线电频带产生干扰。

LP8860-Q1 支持内置混合 PWM 调光和电流调光，从而可降低 EMI、延长 LED 使用寿命并提高总光学效率。相移 PWM 可降低可闻噪声和输出纹波。

器件信息(1)
器件型号封装本体尺寸（标称值）
LP8860-Q1HLQFP (32)7.00mm × 7.00mm
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。
LP8860-Q1 系统效率系统效率